<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			.menu{
				padding: 5px 0;
				width: 25px;
				height: 3px;
				background: black;
				background-clip: content-box; //背景颜色从内容区域开始绘制
				border-top: 3px solid black;
				border-top: 3px solid black;
				border-bottom: 3px solid black;
			}

		</style>
	</head>
	<body>


		<div class="menu"></div>

	</body>
</html>
